Lines passing through the point `(11,-2)` and touching the circle `x^(2)+y^(2)=25` are

An equation of a line passing through the point (-2, 11) and touching the circle x^(2) + y^(2) = 25 is

The radius of the circle passing through the point (8,-3) and touching the curve x^(2)+4y^(2)=25 at (3,2)

The centre of a circle passing through the points (0, 0), (1, 0) and touching the circle x^(2)+y^(2)=9 , is

The centre of the circle passing through (0, 0) and (1, 0) and touching the circle x^(2)+y^(2)=9 , is

Find the gradient of the line passing through the point (2,8) and touching the curve y=x^(3).